He is able

Romans 16:25 Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began,

As Paul finishes his letter to the Romans he commends them to the One that can make a difference in their lives. He knows that his preaching, teaching, loving, and discipling are not what make the difference. They do not have the power to establish them. It will take the power of God to establish them. It is God that makes the difference. So often I think maybe we try too hard. We think it is us! We think that it is the clever way we arrange our words, the pathos we use when we speak, the music we play, etc that get the job done. But the truth is that God and only God can make that difference. So as you raise your children, disciple people, teach your Sunday School class, pastor, preach, trust God to do the work. He is the only One that has that power!